NEW MALLOl'lIACJA. 87 



Canon, California): the American Dii)i»er, Cinclus mex- 

 icanus (Ontario, California); the Western Flycatcher, 

 Ernpidonax- di^^cilis {'2 birds, Ontario, California), and 

 the Ash-throated Flycatcher, Myiarclais cinerascena 

 (Ontario, California). The specimens from the two 

 last-named bird species. Flycatchers, show a common 

 variation from the type specimens in a greater length, 

 less angulated posterior margin of metathorax, and 

 paler markings. Taken previously by Kellogg from 

 eight species of passerine birds. 



Nirmus foedus n. sp. (Plate VI, fig. 7). 



Specimens from the Ash-throated Flycatcher, Myiar- 

 chxis cinerascens (Ontario, California), the Long-tailed 

 Chat, Icteria virens lonyicaiula (Ontario, California), 

 Say's Phcebe, Sayornis saya (Ontario, California), the 

 Arkansas King-bird, Tyrannus verticalis (Ontario, Cal- 

 ifornia), the California Shrike, Lanius liulovicianua 

 (jambeli (Ontario, California) and the Phainopepla, 

 Pkainopepla nitens (Ontario, California). This species 

 belongs to Piaget's second group of circumfasciati, and 

 resembles platydypeatus P. and fvdfer (Les Pediculiues, 

 p. 145, pi. xii, figs. 1 and 2) from Motacilla alba and 

 Liimprotornis ametkystina, respectively. 



Description of the female. Body, length 2.21 mm., 

 width .75 mm.; abdomen broad for Xinnus, pale fus- 

 cous, head darker than the thorax or abdomen, narrow 

 dark lateral borders on the head and thorax, but no 

 dark lateral abdominal bands: pale brown median, 

 transverse abdominal blotches. 



Head, length .50 mm., width .43 mm.: clypeal front 

 varying from narrowly to broadly parabolic, with 

 four short hairs on the margin, a short marginal 

 prickle before the trabecuhe, and two long dorsal hairs 



